Ganryūjima

Standing 153 meters tall, the Kaikyou Yume Tower features an observation deck in the glass sphere at the top, with panoramic views over the city and the Kanmon Straits. Internet access is available at the Yamaguchi International Exchange Association (Tu-Su 10:00-20:00).

Dolphins, penguins, and sea lions join over 100 varieties of pufferfish, with four floors of exhibits about marine science and shows throughout the day. It's right next to the Kanmon Bridge, and buses run directly there.

Built in 1900, this is the oldest post office still in service in Japan.

This European-style building originally housed the offices of a shipping company. There's a particularly nice Japanese garden on the roof; the first floor has sightseeing information and a gift shop.

Built in 1906, with the small Shimonoseki Ijinkan Museum inside and a tea house in the back.

The Treaty of Shimonoseki, which ended the First Sino-Japanese War, was signed on this site in 1895. There is a small museum (built in 1936) dedicated to the treaty with period furniture and some relics. It's next to an expensive ryokan (see Sleep).